提升net.liftweb.http.s＃param不像Wiki所说

Question

我尝试复制Wiki中的示例http://wiki.liftweb.net/index.php/hello_darwin

在helloform2.scala的示例中

"submit" -> submit(?("Send"), () => {println("value:" + who + " :: " + param("whoField"))}),

它总是打印

value:Full(hogehoge) :: Empty" even if i set the who as "object who extends RequestVar(Full("world"))

我做错了吗？

很抱歉忘记发布完整的代码，我已经尝试了Wiki中的第二个代码。 index.html

<lift:surround with="default" at="content">
<h2>Welcome to your project!</h2>
<lift:HelloWorld.show form="POST">
    Hello <hello:who />
    <br />
    <label for="whoField">Who :</label>
    <hello:whoField />
    <hello:submit />
</lift:HelloWorld.show>
</lift:surround>

和helloworld.scala

class HelloWorld {
  object who extends RequestVar(Full("world"));
  def show(xhtml: NodeSeq): NodeSeq ={
    bind("hello", xhtml,
      "whoField" -> text(who.openOr(""), v => who(Full(v))) % ("size" -> "10") % ("id" -> "whoField"),
      "submit" -> submit(?("Send"), () => {println("value:" + who.openOr("") + " :: " + param("whoField"))}),
      "who" -> who.openOr("")
    )
  }
}

现在，WHO在渲染页面中显示正确的内容，但控制台仍然打印value:hogehoge :: Empty

我使用升力1.0

谢谢。

Answer 1

您也必须更改该代码，如Wiki页面示例所示，我将在此处复制：

  bind("hello", xhtml, 
       "whoField" -> text(who.openOr(""), v => who(Full(v))) % ("size" -> "10") % ("id" -> "whoField"),
       "submit" -> submit(?("Send"), () => {println("value:" + who.openOr("") + " :: " + param("whoField"))}),
       "who" -> who.openOr("")
  )

请注意，Whofield的定义非常不同。